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Tin price and tin content of tin wire

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Update time : 2022-09-16 10:52:56
  Anyone engaged in the solder industry knows that in solder products, the tin content of solder ranges from 15% to 99.95%. What is the relationship between the level of tin prices and the tin content of tin wires:
  First of all, let's introduce the little knowledge of the tin content of tin wires: tin wires are divided into lead tin wires and lead-free tin wires according to whether they are environmentally friendly. Among the lead tin wires, the tin wire with the highest tin content is 6337 tin wire. In addition to this 6337 tin wire, it is divided into 6040, 5545, 5050, 4555 and other alloy proportions of tin wire according to its tin content. Why is there no lead-tin wire with a higher proportion than 6337? For example, 7030, 7525, 8020, etc.; in fact, it is like this: 6337 tin wire is the best ratio of lead and tin, and its melting point reaches 183 ℃, which is suitable for the welding of most components and electronic products. The tin wire of 6337 ratio is After rigorous and repeated technical testing and use, it can achieve the best effect of solder wire welding.
  For lead-free tin wires, the most commonly used ones are tin wires with a tin content of 99.3%, copper and 0.7%. In addition, there are lead-free silver-containing tin wires with an Ag content of 0.3-3.0%, and lead-free tin wires with Sn42Bi58 alloy ratio. Low temperature tin wire, etc. The melting point of conventional lead-free tin wire is 217-227℃. The suitable melting point and perfect alloy ratio make the welding effect meet the welding requirements of environmentally friendly electronic products. The content of tin in lead-free low-temperature tin wire is 42%. Due to the brittleness of the Bi component itself, the welding firmness of low-temperature tin wire is not very good, but its melting point is only 138 °C, which can avoid the failure of some components during welding. Burn out due to high temperature. The melting point of silver-containing lead-free tin wire is 210-217°C, and its tin content is between 96.5-99%. For the high welding requirements of high-end precision electronic products, lead-free environmental protection tin wire has passed the Rohs environmental protection testing certification.
  Through the introduction of the tin content of the tin wire above, we can know that the tin content of the environmentally friendly tin wire is much greater than that of the leaded tin wire, and the tin price of the corresponding environmentally friendly tin wire is much higher than that of the leaded tin wire. , This is very certain, that is, the amount of tin content determines the level of tin price, then the level of tin price in lead-tin wire I believe everyone should understand the difference.
  The silver-containing tin wire and low-temperature tin wire in the lead-free environmentally friendly tin wire are more complicated in the production process than the commonly used lead-free tin wire, and their raw materials are also different, so the tin price is relatively high, we can summarize the middle tin price There is a certain relationship between the level of tin and the content of tin. The second is related to the production process. The level of the third tin value is also related to the composition of tin alloys and other auxiliary materials other than tin.
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